Monitor JK BMS with Solar Assistant?
- Thread starter Redbeardbeer
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Can’t wait to try it.
Nami
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I am designing the upper computer program, and then I am also contacting the factory to customize the ttl/usb converter. It may take some time. I will reply in time when I have the latest news
It's the 4 pin port labeled GPS. See last picture here:
diysolarforum.com
Hankzor JK BMS with screen and power button
@Nami Could you PM me a picture with the ports of all the current BMS versions out there so we can identify them? I can put them together in a resource and/or the wiki so it becomes easier to keep track of new versions, changes in connectors, etc. BTW: Not sure where this should be posted, but...
diysolarforum.com
Hi Maintman , can you share model , link something to help buying the good one? thx
Dang, I just got my 4 pin JST 1.25 and hooked it up to a ESP32 which is connected to HA with https://github.com/syssi/esphome-jk-bms towards the end of my vacation, but I get no readings from the JK BMS. Do you guys know if you have to restart the JK BMS or something to get it to detect the connection? The esp32 log is just quiet. When I remove the JST from the BMS it instantly reacts. Don't really know how to search for errors and how to rule out hardware issues. I think the connections should be OK, but the cables are darn small and there could of course be something that isn't 100%...
No, not needed.
Double check the TX/RX lines. Turn them around just to make sure. Also make sure not to connect Vcc.
I am using this one.
DTECH FTDI USB to TTL Serial Adapter 3.3V Debug Cable 6 Pin Female Socket Header UART IC FT232RL Chip for Windows 11 10 8 7 Linux MAC (3ft, Black) https://a.co/d/eFeFTvC
Huck
Watts are Universal
No, But I’m growing very impatient. Besides the problems with the JK BMS (which I have sent them emails on with no response) but I have now metric issues that don’t add up with my Growatt inverters. I sent an email, got one response, and I sent one back with no follow up. I’ve now gone through several software revisions with no fix to my problems. It seems as though they only care about adding value in the form of adding more products support rather then fixing existing issues. Which is subpar in my book. I’m getting ready to sell everything but the batteries and just buy all Victron.
NCSolarGarage
13.2kW Off-Grid
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Does that ESP32 require an arduino to work, or can you hook it up just usb to power, and then connect rx/tx and connect to it via wifi?
I am not familiar with Arduino but use a RPI4 and Home Assistant to communicate to the ESP32 via wifi. I don’t think the esp32 can work entirely stand alone. But physically it can be connected to wifi and just need a power cord to “work”, so I wouldn’t rule it out.
Hi guys,
I am having an issue with my system and it could perhaps be attributed to JK BMS or the Victron MPPT.
The system all of a sudden stopped charging about two weeks ago. But from afar, everything seem to be in order. Everything else works. There have been no issues with temperature or delta cell deviations.
Could there be anything with the JK BMS stopping charging? Can you check that from afar?
It says that the “Dedicated Charger” is off, what does that mean? Charging is on/enabled.
I am having an issue with my system and it could perhaps be attributed to JK BMS or the Victron MPPT.
The system all of a sudden stopped charging about two weeks ago. But from afar, everything seem to be in order. Everything else works. There have been no issues with temperature or delta cell deviations.
Could there be anything with the JK BMS stopping charging? Can you check that from afar?
It says that the “Dedicated Charger” is off, what does that mean? Charging is on/enabled.
I don't know what the "dedicated charger switch" is - it doesn't match anything on the user interface, might be something for a dual port version or maybe the relay versoon? @Nami what is that "dedicated charger switch" (also called "Special charger switch" in the protocol pdf)?
I don't think that's the issue though. Can you monitor what's going on with the charge controller?
I don't think that's the issue though. Can you monitor what's going on with the charge controller?
Me neither, it has a history and nothing has changed, ie it hasn’t turned from off to on the 7th August when it stopped charging.
Yeah, I can access the MPPT and everything looks like it should. It’s on and has no error messages.
Hm, even if it was the JK BMS not enabling any charging — the MPPT should put out power to the inverter directly, right? Daily yield should never be 0%? This rules out the JK BMS unless I am mistaken.
My cousins tried to flip on and off the MCB today between the MPPT and the inverter/battery and nothing changed. So it hasn’t tripped. I wonder if it could be faulty some other way? I don’t trust the quality of that MCB…
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Nami
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Quattrohead
Solar Wizard
Is this the right connector for the GPS/possible RS485 connector ?
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